// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_URL_REQUEST_URL_REQUEST_FILE_DIR_JOB_H_
#define NET_URL_REQUEST_URL_REQUEST_FILE_DIR_JOB_H_

#include <string>

#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/worker_pool.h"
#include "net/base/directory_lister.h"
#include "net/base/net_errors.h"
#include "net/base/net_export.h"
#include "net/url_request/url_request_job.h"

namespace net {

class NET_EXPORT_PRIVATE URLRequestFileDirJob
    : public URLRequestJob,
      public NON_EXPORTED_BASE(DirectoryLister::DirectoryListerDelegate) {
public:
    URLRequestFileDirJob(URLRequest* request,
        NetworkDelegate* network_delegate,
        const base::FilePath& dir_path);

    URLRequestFileDirJob(URLRequest* request,
        NetworkDelegate* network_delegate,
        const base::FilePath& dir_path,
        const scoped_refptr<base::TaskRunner>& dir_task_runner);

    void StartAsync();
    // Overridden from URLRequestJob:
    void Start() override;
    void Kill() override;
    int ReadRawData(IOBuffer* buf, int buf_size) override;
    bool GetMimeType(std::string* mime_type) const override;
    bool GetCharset(std::string* charset) override;

    // Overridden from DirectoryLister::DirectoryListerDelegate:
    void OnListFile(const DirectoryLister::DirectoryListerData& data) override;
    void OnListDone(int error) override;

protected:
    ~URLRequestFileDirJob() override;

private:
    void CloseLister();

    // When we have data and a read has been pending, this function
    // will fill the response buffer and notify the request
    // appropriately.
    void CompleteRead(Error error);

    int ReadBuffer(char* buf, int buf_size);

    DirectoryLister lister_;
    base::FilePath dir_path_;

    const scoped_refptr<base::TaskRunner> dir_task_runner_;

    std::string data_;
    bool canceled_;

    // Indicates whether we have the complete list of the dir
    bool list_complete_;

    // Indicates the status of the list
    Error list_complete_result_;

    // Indicates whether we have written the HTML header
    bool wrote_header_;

    // To simulate Async IO, we hold onto the Reader's buffer while
    // we wait for IO to complete.  When done, we fill the buffer
    // manually.
    bool read_pending_;
    scoped_refptr<IOBuffer> read_buffer_;
    int read_buffer_length_;

    base::WeakPtrFactory<URLRequestFileDirJob> weak_factory_;

    DISALLOW_COPY_AND_ASSIGN(URLRequestFileDirJob);
};

} // namespace net

#endif // NET_URL_REQUEST_URL_REQUEST_FILE_DIR_JOB_H_
